ON5 COMPANY was set up on the basis of an innovative approach, this being "non energy", which is also known as "negawatt"". This vision is based on the new energy paradigm, as described in the book by Myriam Maestroni called "Understanding the world of energy 2.0".


On5 Company


ON5 Company : a group composed of 4 companies

Grup On5

Economie d’Energie (EDE) in France

It all began in 2005 when Myriam Maestroni was the Managing Director of Primagaz in France. “ The objective of reducing energy consumption by 20% in line with the Kyoto Protocol was difficult for professionals to understand. The measure was counter-intuitive in that it was helping customers to consume less.”

This was a turning point. With the French “POPE” Law (Orientation Programme for Energy Policy) of July 2005, energy saving became a priority in French energy policy. This law, which required the issuing of energy-saving certificates, compelled energy distribution companies to help their customers to consume less or face a fine.

Thus, one year later, in 2006, Myriam Maestroni, who was aware of the importance of this issue, set up an energy-efficiency consultancy within Primagaz. This was the first time anything of this kind had been set up; transforming a conventional energy provider into a sustainable-energy solutions provider.

In 2007, with the intention of supporting energy companies to make this change, Myriam Maestroni decided to set up a more structured company : Economie d’Energie. It was in 2011 that the spin-off from Primagaz became a reality. EDE has therefore been at the forefront of renovating the French building sector and has created 100 jobs. This has meant that more than 250 000 private individuals have been able to carry out energy renovation work.

ON5 Company in Spain

In 1991, Myriam Maestroni launched the first petroleum distribution business in Spain. That was when the petroleum industry monopoly was opened up. At this time, the key to accessing this market was logistic infrastructure; one can not imagine developing an energy business without being able to guarantee its supply. This is how Koalagas was established, the first independent LPG terminal in Spain.

Today, over 20 years later, Spain is facing a new shift due to the European Directive of 2012 imposed on the member states. From 2014 an energy efficiency obligation scheme has been put into place, commonly known as White Certificates. Utilising her expert background in France, Maestroni would like to help Spanish companies turn something that could be seen as an obligation into an opportunity.


Backed by its solid expertise in energy efficiency mechanisms, especially White Certificates in France and its knowledge of the Italian market, ON5 meets the needs of the energy sector’s players, adapting its proposition effectively to Italian legislation. ON5 also supports all players involved in the field of energy efficiency, by providing them with innovative digital services and helping them improving their own customer solutions.

ON5 services are designed to answer the needs of :

  • Obligated distributors
  • Obligated energy suppliers
  • ESCO’s
  • Industrial and service companies

ON5 provides digital solutions to clients, or customers of clients, in their energy-efficiency renovations. ON5 also offers innovative solutions to support corporate sustainable development strategy. Our main services are :

  • Energy audits and renovation works recommendations ;
  • TEE (Italian White Certificates) ;
  • Control of energy efficiency investments (financial simulation, calculation and follow up of ROI) ;
  • Energy consumption monitoring (SAAS mode) and reduction of energy bills;
  • Support programs for eco-actions.



The Team

There are 100 of us working at ON5 COMPANY GROUP. We have all different background from young talented individuals to senior experienced energy professionals. We have one common passion all fully engaged personally with the company’s purpose.

We are now expanding in Europe (Italy, Spain) and now UK under the brand name ON5


Myriam Maestroni CEO


Franck Bruneau Vice-President


Christelle Spiry Sustainable Development Director


François Châtelain Marketing Director


Rosa Uriona ON5 Company Spain Director


Nicolás Diez Perez IT Director


Anne Creusy Finance Director

Christophe Casabonne Risk Management Director




Pauline Richard Technical Director


Antoine Grosse Director of operations


DOMINIQUE RAJZBAUM Market Services Director


Foundation e5t



The purpose of the e5t Foundation is to become the one stop think tank that will influence operators to act upon: “Energy Efficiency, Saving energy and our local communities” 

E5t is an open think-tank where everyone who is working and/or is concerned by the challenges and opportunities could share and collaborate with peers and other practitioners, researchers and business contacts. 

The vision of the foundation to help identify and address the challenges we all face in relation to the decrease of stocks fossil energies and their now recognized detrimental effect on the environment. E5t foundation will contribute to generate and communicate about innovative solutions to these climate change energy dependency related issues. 


  1. To engage the know-how and skills of all the energy industry practitioners (enterprises, politicians, public servants, students, teachers and consumers). At our Summer Event (last over 2 days in August in La Rochelle in France), each invited speaker will be given the opportunity to present their work for 10 minutes individually or within a round-table discussion.
  2. In order to promote and raise the profile and media visibility of innovative ideas and businesses in Energy Efficiency, we have created the Energy Innovation Awards for Local Communities. These Awards will incentivize the launch of new projects and initiatives that will directly or indirectly contribute to adapt to the shift to renewable energy.

Applicants need to apply via our website on www.e5t.fr and choose one of the three following categories :

  • Innovation
  • Efficiency: Implementation and tangible impact
  • Positive Impact on local communities

If you would like to know more about our projects, go to the link www.e5t.fr

This year, the 3 winners of our Energy Efficiency Awards are:

  • The company called Continental for their connected and self-driven vehicules
  • The company called Atlantech for their implementation of low carbon services
  • John Deere France for their positive impact on helping farmers to save energy


  • The first summer university conference of the 5et Foundation in La Rochelle took place on the 28th and 29th of August 2013 under the title “ Energy, Energy Efficiency and Local Communities.’ With over 130 attendees and 45 scheduled talks, the event was a huge success.
  • The second conference under the title “Energy transition, Innovation and Local Communities, “on the 27th and 28th of August 2014, was an even greater success with the participation of over 230 people attending 50 talks.
  • This year’s conference has exceeded expectations. On the 26th and 27th of August 2015, under the title “In the run up to COP21 - are France and Europe good examples?” The event had closed to 280 participants and 60 speakers.
  • The fourth edition will take place on August 24th and 25th, 2016 at La Rochelle, France. Participants will this year lead an innovative thinking around the issue of “ the low carbon growth paradox, from the Paris Agreement to the solutions of the COP22”.

To obtain all the information and to register, http://www.e5t.fr/

Our Summer Conferences

We hosted our first Summer Conference in August 2013 around « Energie, Efficiency and Local Communities ». Our 130 visitors and 45 speakers contributed actively to engage us to organise it as an annual event.

In 2014, we gathered speakers to present their work and views on “Energy shift, Innovation and Local Communities”. More than 230 visitors came to listen to 50 speakers.

In August 2015, we gathered to review the challenges and opportunities around “the COP21 International Summit, Are France and Europe role models?” with 280 visitors and 60 speakers.

For more information about our Summer Conferences, please look onto our website: www.e5t.fr

ON5 Company is the International brand created by the French company Economie d’Energie SAS. Since 2011, Economie d’Energie has been providing innovative web based Energy Efficiency solutions to businesses, local institutions and schools. ON5 Company services are based on 3 pillars: 

Energy 1.0: Innovative initiatives to engage individuals to act upon saving energy 

Energy 2.0: Digital solutions designed to help businesses, their clients and/or their consumers to renovate buildings and homes 

Energy 3.0: Implementation of innovative all connected systems to help energy consumers to be more energy efficient  


energy 1.0

Energy 1.0

logo-b2020-vertical«B2020 Generation, Eco-friendly together» is an innovative solution for dealing with new environmental challenges to aid the economic and sustainable development of your company or local authority.

What does this mean in real terms?

  • A collaborative, participatory, informative platform which allows progress factors to be assessed in real time.
  • A complementary range of services which offer customised support and run the program for a substantial duration.
  • A competition for member companies if they wish to participate.

What are its goals?

  • To position Energy Efficiency at the heart of « Economic and Sustainable development » for companies and local authorities.
  • To reduce energy consumption and the public environmental footprint in line with the objectives of European regulation framework objectives as we approach 2020.
  • To give meaning to companies’ and public authorities’ CSR policy by inviting their staff and members of their jurisdictions to take part in a simple, amusing, easy-access competition.
energy 2.0

Energy 2.0

DEES (Digital Energy Efficiency Solution)

DEES is a web platform on which each stage of the energy efficiency value chain can be utilized as much individually as in tandem, in order to give private individuals information on, help with, and continued support with energy efficiency work on their houses.

This tools provides an overall guide to energy efficiency work on houses with an online energy assessment, recommendations on renovations and which products to be used and a financial plan of the project detailing all the financial aid available for this venture. What’s more, the platform allows the user to follow each stage of the project.

Specific programmes that deal with white certificates

With more than 30 projects implemented in France, we have received over 5 million in web visits across the varied websites of our clients, 250,000 energy-efficiency renovations and over €52 million in grants for this work.

energy 3.0

Energy 3.0

Consulting in energy purchase strategy

Our role starts by analysing energy consumption and how much it costs, which can be based on either invoice analysis or live data transmission; we can also carry out energy audits. Once a simulation of prices has been drawn up and recommendations have been put forward, we will help you to make a decision as to which investment is best dependent on personalised requirements.

Energy Management System

In order to optimise our customers’ energy supply, we can make monitoring and energy management tools available in SaaS (Software as a Service) mode, including for multi-energy, multi-provider or multi-site customers. Once the energy performance indicators have been defined, it will be possible to determine which are the most suitable actions to be put in place.

Energy purchase support

So as to optimise energy purchase, we help customers manage their calls for tender with the aim of receiving offers from various energy providers. Once each case has been studied, we then compare the offers and negotiate alongside the customer until a contract is selected and awarded to one of the energy providers.

Support in ISO 50001

We can advise you when setting up an energy management system. Our aim is to develop a systematic approach and thus implement continuous improvement in the use of energy, including energy efficiency, energy supply, energy use and consumption.


The United Kingdom was the first country to implement Energy Efficiency obligations, as early as 2002, essentially used for improving insulation and supporting energy-poor homes.

The Office of Gas and Electric Markets (OFGEM) established three-year commitment periods (2002-2005 and 2005-2008 for the first and second periods).

In 2008, the UK supplanted the EEC program with a new scheme called the Carbon Emissions Reduction Target (CERT) to focus on residential energy efficiency measures. In 2009, The Community Energy Saving Program (CESP) came into force as part of the government's Home Energy Saving Program. Both programs ran until 2012.

Energy Company Obligation: the current energy efficiency obligation scheme

The ECO scheme started on 1 January 2013 and ran until March 2015. The original lifetime of the scheme has been extended. The new obligation period, known as ECO2, was launched on 1 April 2015 and will run until 31 March 2017.

The Energy Company Obligation (ECO) is a government scheme to obligate the large energy suppliers that have 250,000 domestic customers or more, and supply more than 400 GWh of electricity or 2,000 GWh of gas to domestic customers, to deliver energy efficiency measures to domestic premises in the UK.

The ECO scheme is divided into three obligations: Carbon Emissions Reduction Obligation (CERO), Carbon Savings Communities Obligation (CSCO), and Affordable Warmth (HHCRO).

  • The Carbon Emissions Reduction Obligation (CERO) is specifically for those who live in poorly insulated homes. It’s available to everyone regardless of their availability to pay. This covers the installation of measures which can’t be financed through Green Deal because the amount of cost doesn’t meet the golden rule, such as solid wall insulation and hard-to-threat cavity wall insulation. Connection to heating district system can also be funded through CERO.
  • The Carbon Saving Communities Obligation (CSCO) provides insulation measures for people living in a qualifying deprived area. Householders living in a designated low-income area will qualify for funding. CSCO also supports those who live in rural areas of the country with less than 10,000 homes and vulnerable householders receiving specific means-tested benefits.
  • The Home Heating Cost Reduction Obligation (HHCRO) also known as the “Affordable Warmth Obligation” provides heating and insulation measures to low-income and vulnerable households such as low-income families, disabled and elderly people. Customers must own or rent the property and receive certain means-tested benefits such as child tax credit, state pension credit or income support.

The Green Deal: A new government policy from 2013

The ECO scheme works alongside the Green Deal scheme, a financing mechanism launched in 2013 in England, Wales and Scotland.

The Green Deal allows companies in the private sector or other organisations to offer consumers energy-efficiency improvements in their homes and in their companies, all or part of which can be reimbursed over time via the electricity bill, with repayments not exceeding what a typical household would save on energy costs.

The responsibility for such reimbursements is transferred to each successive occupant of the house, owner or tenant.

White certificates, known as « Energy Saving Certificates » in France, is a governmental scheme created by Articles 14 to 17 of the POPE act establishing the guidelines of the French energy policy, published on the 13th of July 2005. This scheme is one of the main instruments of energy management policy in France. It is based on mandatory energy savings, enacted by public authorities to energy suppliers known as “obligated”, whose sales exceed a threshold established by decree. This three-year obligation incentivizes the obligated parties to promote energy efficiency among their customers (households, or professionals). This obligation, which depends on the sales volume (in kWh) of the obligated parties, is expressed in kWh cumac of final energy.

In order to satisfy their obligation, the obligated parties have the following options:

  1. Generating their own White Certificates by incentivizing their customers to save energy in all sectors, such as residential, services, industrial, agricultural and transport.
  2. Buying White Certificates from other players involved in energy efficiency operations, especially eligible parties which are not subjected to the obligation (territorial collectivities, the French Housing National Agency, social landlords).
  3. Make a financial contribution to programs.

Over the different periods, the obligation has increased as follows:

  • First period from May 2006 to mid-2009 : target of 54 TWh cumac;
  • Transitional period from mid-2009 to end-2010 : no obligation;
  • Second period extended from 2011 to end-2014 : target of 345 + 115 TWh cumac;
  • Third period from 2015 to 2017: target of 700 TWh cumac.

The target of the first period was fully achieved on the 1st of July 2009 with a volume of 65.3 TWh cumac. Following these good results, the White Certificates scheme was renewed for a second three-year period by Article 78 of the 2010-788 act of the 12th of July 2010, establishing a national environmental commitment starting in 2011. After the announcement of a third period, it was decided to extend the second period for an additional year.

Over the years, the scheme has been growing and has shown its efficiency. It now constitutes one of the main instruments of the French energy policy. In the French notification to the European Commission of the 5th of December 2013, it is stated that the White Certificates scheme will significantly aid the target set by Article 7 of the 2012/27/UE directive of the 25th of October 2012 for energy efficiency. This article outlines that France will have to, every year until 2020, save the equivalent of 1.5% of the energy volumes sold between 2010 and 2012.

The third period started in January 2015 with an obligation of 700 TWh cumac, i.e. twice the obligation of the second period.

In Italy, the White Certificates Scheme, also called “Titles of Energy efficiency” or “TEE” was introduced into the Italian legislation by the Ministerial Decree of 20 July 2004. Parties eligible to submit projects for accruing white certificates are “obliged parties” and “volunteer parties”.

The obliged parties include electricity and gas distributors with more than 50,000 customers.

The volunteer parties include:

  • non-obliged distributors;
  • controlled companies of the obliged parties;
  • companies operating in the sector of energy services (ESCOs);
  • companies or organisations having an energy manager or an ISO 50001 - certified energy management system in place.

The targets are expressed in annual primary energy savings (in Mtoe/year), with 1 TEE for 1 toe. The Decree of 28 December 2012 sets national quantitative energy-saving targets, incremental over time for electricity and gas distributors for the years 2013 to 2016:

  1. 2013: 4.6 Mtoe/year
  2. 2014: 6.2 Mtoe/year
  3. 2015: 6.6 Mtoe/year
  4. 2016: 7.6 Mtoe/year

The obliged parties can fulfil their obligations directly by implementing projects, or by buying White Certificates via bilateral contracts with operators, or via the trading platform managed by GME.

There are 3 evaluation methods for the acquisition of white certificates:

  • The “Standard” evaluation method: energy savings are calculated on the basis of technical sheets;
  • The “Analytical” evaluation method: energy savings are calculated on the basis of an algorithm defined in technical sheets. The project administrator gives that information in the Richieste di Verifica e Certificazione dei risparmi (Requests for verification and certification of savings) successive to the first one to obtain TEE;
  • The EX post evaluation method is used when no technical sheet corresponds to the energy efficiency improvement works. This method is also used for projects composed of one or more improvement works for which standard and analytical evaluation methods can be used and for improvement works that can be assessed with different evaluation methods.

Italy has an overall objective of 25.5 Mtoe of energy savings to reach before 2020. The various schemes chosen by Italy, that are White Certificates, thermal account and tax deductions should lead to a cumulated energy saving of 25.83 Mtoe, of which 62% should be reached thanks to the White Certificates Scheme.

In order to reach the target of a 20% improvement in the EU’s energy efficiency by 2020, as stipulated in the Climate and Energy Package, the European Parliament voted and adopted the Energy Efficiency Directive (EED), published in the European Union’s Official Journal on 14 November 2012.

Being a true legislative “revolution”, this European Energy Efficiency Directive stipulates that it is now up to the energy supplier to promote energy savings based on a percentage of their annual energy sales, excluding transport, to consumers.

According to the objectives set out in article 7 of the Energy Efficiency Directive, the national objective for the mechanism of energy savings implemented by the Member State “must at least be equivalent to the achievement, each year from 1 January 2014 to 31 December 2020, of new energy savings of 1.5%, in volume, of annual energy sales of all energy suppliers and distributors, calculated on the average of years 2010, 2011, 2012”.

In order to meet its target, 15,979 ktoe (kilo ton of oil equivalent), Spain has therefore decided to implement an energy efficiency obligation scheme for energy sales companies, 6,356 ktoe, as well as alternative measures, 4,662 ktoe, and has created an Energy Efficiency National Fund, in accordance with article 20 of the Directive, to support the obligation scheme, 4,961 ktoe.

In this sense, the Royal Decree-Law 8/2014, dated 4 July, approving urgent measures for growth, competitiveness and efficiency has been published.

The Royal Decree-Law establishes a system of obligations for companies selling gas and electricity, for wholesale operators of oil products, and for wholesale operators of liquefied petroleum gas. The Spanish energy efficiency obligation scheme has been in effect since 5 July 2014 and will run until 31 December 2020.

Each year the Ministry of Industry, Energy and Tourism determines an annual savings target and the share of each obligated party depending on their final energy sales, as well as the financial equivalent to calculate the amount equal to the investment necessary to comply with these obligations through contributions to an Energy Efficiency National Fund. The Royal Decree-Law stipulated that all obliged parties must make a contribution to the Energy Efficiency National Fund for 2014.

The White Certificate [Certificados de Ahorro Energético (CAE)] scheme will be set up, based on a catalogue of energy efficiency actions. These certificates will be negotiable and will be managed by the Spanish Institute for Energy Diversification and Savings (IDAE).

On 20 February 2015, the Order IET/289/2015 was published. It establishes the mandatory contributions of the Spanish obligated parties to the Energy Efficiency National Fund for 2015.

The Order stipulated:

  • the amount of energy savings (i.e. saving 262 ktoe or 3,046.51 GWh for all obligated parties;
  • how the new target is split between each obligated party (%);
  • the financial equivalent for 2015 is 0.789728 million euros per ktoe saved, or 67,916.58 euros per GWh saved.

The obligated companies paid their contribution to the Energy Efficiency National Fund in three payments, before 30 June.

Following their publication in the Official Journal on 5 May 2015, programs set up by the Ministry of Industry, Energy and Tourism came into effect, through the Spanish Institute for Diversification and Energy Savings (IDAE).

Four areas of work have been chosen: building energy renovation, transport, SMEs and large companies of the industrial sector and communities’ public lighting. Such programs will help save the equivalent of the annual consumption of more than 150,000 families as well as the emission of 440,000 tonnes of CO2 into the atmosphere.

Direct support and approved funding programs are part of the National Energy Efficiency Action Plan for 2014-2020, and will allow Spain to reach the savings objectives set by the 2012/27/UE European Directive.

Such areas of work are financed with a total budget of 168 million euros, coming from the National Fund for Energy Efficiency as well as the general State budget.